1. Turn off TV
2. Press in this order on after another on the remote: INFO - MENU - MUTE - POWER (just like described above)
3. Go to Service Menu Option - MRT Option - Turn on : Camera Support / Motion Recognition / Voice Recognition ( this one is greyed out )
Initially i did not had Camera Support turned on, but the Motion Recognition was greyed out. After turning it on, the Motion icon popped on the screen.
Hope this helps !
Thanks in advance.